Hydraulic apparatus for fluid pressure control

Abstract

A hydraulic apparatus includes a fluid pressure control unit which includes: a housing unit enclosing a pump, a motor fixed to a first side surface of the housing unit; a control section provided on a second side surface of the housing unit and arranged to control the motor; and a physical quantity sensor fixed to the control section. There are further provided a plurality of mount portions to support the housing unit to a vehicle body elastically. The physical quantity sensor is located between the mount portions.

1 . A hydraulic apparatus comprising a fluid pressure control unit which comprises:
 a housing unit enclosing a pump, and including a first side surface on a first side, and a second side surface on a second side opposite to the first side;   a motor fixed to the first side surface of the housing unit and arranged to drive the pump;   a control section disposed on the second side of the housing unit and arranged to control the motor;   a cover covering the control section;   a physical quantity sensor fixed to the control section, placed between the housing unit and the cover, and arranged to sense a physical quantity of a vehicle; and   a plurality of mount portions to support the housing unit to a vehicle body elastically, the physical quantity sensor being located between the mount portions.   
   
   
       2 . The hydraulic apparatus as claimed in  claim 1 , wherein the pump is a piston pump including a cam fixed to a motor shaft of the motor, and a piston arranged to reciprocate in accordance with motion of the cam. 
   
   
       3 . The hydraulic apparatus as claimed in  claim 2 , wherein the hydraulic apparatus further comprises a flexible tube; the fluid pressure control unit further includes a connection port connected with the flexible tube for connecting the connection port with a hydraulic device; and the connection port is located above the pump whereas the physical quantity sensor is located below the pump. 
   
   
       4 . The hydraulic apparatus as claimed in  claim 2 , wherein the hydraulic apparatus further comprises a rigid tube; the fluid pressure control unit further includes a connection port connected with the rigid tube for connecting the connection port with a hydraulic device; and the connection port is located above the pump and the physical quantity sensor is also located above the pump. 
   
   
       5 . The hydraulic apparatus as claimed in  claim 1 , wherein the physical quantity sensor is located within an imaginary polygon formed by imaginary lines connecting the mount portions in a bottom view as viewed from a lower side of the housing unit in a state in which the housing unit is to be installed in a vehicle. 
   
   
       6 . The hydraulic apparatus as claimed in  claim 5 , wherein the physical quantity sensor is disposed on an extension of an axis of the motor in the bottom view as viewed from the lower side of the housing unit. 
   
   
       7 . The hydraulic apparatus as claimed in  claim 5 , wherein the mount portions comprises two first mount portions supporting the first side surface of the housing unit in a first supporting direction extending along an axis of the motor and a second mount portion supporting a bracket projecting from a lower surface of the housing unit, in a second supporting direction orthogonal to the first supporting direction. 
   
   
       8 . The hydraulic apparatus as claimed in  claim 7 , wherein the mount portions are arranged so that a center-of-gravity line of the pressure control unit lies between the mount portions. 
   
   
       9 . The hydraulic apparatus as claimed in  claim 8 , wherein the physical quantity sensor is disposed between the center-of-gravity line and the second mount portion. 
   
   
       10 . The hydraulic apparatus as claimed in  claim 9 , wherein the pump is a piston pump including a piston reciprocating along a pump axis. 
   
   
       11 . The hydraulic apparatus as claimed in  claim 10 , wherein the hydraulic apparatus further comprises a flexible tube; the fluid pressure control unit further includes a connection port connected with the flexible tube for connecting the connection port with a hydraulic device which is one of a master cylinder and a wheel cylinder; and the connection port is located above the pump axis of the pump whereas the physical quantity sensor is located below the pump axis of the pump. 
   
   
       12 . The hydraulic apparatus as claimed in  claim 10 , wherein the hydraulic apparatus further comprises a rigid tube; the fluid pressure control unit further includes a connection port connected with the rigid tube for connecting the connection port with a hydraulic device which is one of a master cylinder and a wheel cylinder; and the connection port is located above the pump axis of the pump and the physical quantity sensor is also located above the pump axis of the pump. 
   
   
       13 . The hydraulic apparatus as claimed in  claim 10 , wherein the physical quantity sensor is disposed between the pump axis of the pump and the second mount portion. 
   
   
       14 . The hydraulic apparatus as claimed in  claim 1 , wherein the pressure control unit is a brake fluid pressure control unit which further comprises an electromagnetic valve to control a brake fluid pressure; the control section is configured to control the motor and the electromagnetic valve; the physical quantity sensor includes a yaw rate sensor; and the yaw rate sensor is located among the mount portions. 
   
   
       15 . A hydraulic apparatus comprising:
 a housing unit including a pump, a first side surface on a first side, and a second side surface on a second side opposite to the first side;   a motor which is fixed to the first side surface of the housing unit and which includes a rotary member rotating about a motor axis extending in a first direction, to drive the pump;   a second side section fixed to the second side surface of the housing unit and including a control section to control the motor and a physical quantity sensor disposed on the second side of the housing unit and arranged to sense a physical quantity; and   a pair of a first side mounting device to support the housing unit elastically on the first side and a second side mounting device to support the housing unit elastically on the second side, at least one of the first and second side mounting devices being arranged to support the housing unit at two separate mount points which are spaced apart from each other in a second direction perpendicular to a first imaginary plane containing the motor axis, the physical quantity sensor being located, in the first direction, between the first side mounting device and the second side mounting device, and located, in the second direction, between the separate mount points on both sides of the first imaginary plane.   
   
   
       16 . The hydraulic apparatus as claimed in  claim 15 , wherein the physical quantity sensor is located at a sensor position lying on the first imaginary plane containing the motor axis and extending in a third direction which is orthogonal to the first and second directions and which is an up and down direction. 
   
   
       17 . The hydraulic apparatus as claimed in  claim 16 , wherein the hydraulic apparatus is hydraulic apparatus for a vehicle brake system, the housing unit includes a master cylinder port to be connected with a master cylinder and a wheel cylinder port to be connected with a wheel cylinder; the master cylinder port and the wheel cylinder port are located above a second imaginary plane containing the motor axis and extending in the second direction; and the first and second side mounting devices are located below the second imaginary plane. 
   
   
       18 . The hydraulic apparatus as claimed in  claim 17 , wherein the sensor position of the physical quantity sensor is away from the second imaginary plane. 
   
   
       19 . The hydraulic apparatus as clamed in  claim 18 , wherein the first side mounting device includes a first elastic support member supporting the housing unit elastically in a first elastic support direction, the second side mounting device includes a second elastic support member supporting the housing unit elastically in a second elastic support direction orthogonal to the first elastic support direction. 
   
   
       20 . The hydraulic apparatus as clamed in  claim 19 , wherein the positions of the first side mounting device and the second side mounting device are spaced apart in the third direction. 
   
   
       21 . A hydraulic brake apparatus for a vehicle, comprising a brake fluid pressure control unit which comprises:
 a housing including a first side surface and a second side surface opposite to the first side surface;   pumping means disposed in the housing, for producing a brake pressure to be supplied to a wheel cylinder of the vehicle;   driving means fixed to the first side surface of the housing, for driving the pumping means;   controlling means fixed to the second side of the housing, for controlling the driving means;   sensing means mounted on the controlling means at a sensor point, for sensing a vehicle motion variable of the vehicle; and   supporting means for supporting the housing to a vehicle body elastically at a plurality of mount points so that the sensor point is located between the mount points.   
   
   
       22 . The hydraulic apparatus as clamed in  claim 21 , wherein positions of the mount points in a predetermined imaginary reference plane are arranged to form an imaginary convex polygon in the imaginary reference plane so that the sensor point is located within the imaginary convex polygon.